discodb: more accurate value size estimation for maybe_disable_compression
discodb: more accurate value size estimation for maybe_disable_compression

ktkt2009/disco,mwilliams3/disco,discoproject/disco,simudream/disco,beni55/disco,beni55/disco,beni55/disco,ErikDubbelboer/disco,discoproject/disco,ktkt2009/disco,mwilliams3/disco,mwilliams3/disco,pombredanne/disco,seabirdzh/disco,ktkt2009/disco,oldmantaiter/disco,mwilliams3/disco,oldmantaiter/disco,pombredanne/disco,oldmantaiter/disco,discoproject/disco,seabirdzh/disco,seabirdzh/disco,oldmantaiter/disco,ErikDubbelboer/disco,simudream/disco,pooya/disco,pombredanne/disco,ktkt2009/disco,mozilla/disco,pombredanne/disco,beni55/disco,seabirdzh/disco,ErikDubbelboer/disco,oldmantaiter/disco,mozilla/disco,pavlobaron/disco_playground,scrapinghub/disco,simudream/disco,pooya/disco,pavlobaron/disco_playground,seabirdzh/disco,simudream/disco,ErikDubbelboer/disco,beni55/disco,scrapinghub/disco,mozilla/disco,pombredanne/disco,mozilla/disco,ErikDubbelboer/disco,discoproject/disco,pooya/disco,ktkt2009/disco,mwilliams3/disco,scrapinghub/disco,discoproject/disco,pavlobaron/disco_playground,pooya/disco,simudream/disco,scrapinghub/disco,pavlobaron/disco_playground